Original scientific paper

Analysis of oxygen enriched combustion characteristic of 350 MW utility boiler based on computational fluid dynamics

X. M. Wang ; School of Civil Engineering, Liaoning University of Science and Technology, Anshan, China
X. L. Wu ; Anshan Municipal Gas General Company, Anshan, China
W. Q. Zhou ; Anshan Boiler works Co.Ltd, Anshan, China

Abstract

Three dimensional model of 350 MW utility boiler furnace was established by CFD to explore the combustion characteristics of pulverized coal at different O₂ / CO₂ ratios. The temperature field, sub-concentrations distributions, burner wall heat loads and movement trajectories of pulverized coal particles were analyzed and compared with those in the air atmosphere. The numerical results shows: the furnace temperature increases as the value of O₂ concentration and the peak value of radiation appears at 20 metres in furnace; Oxygen enrichment combustion process can effectively reduce the exhaust flue gas temperature; The combustion condition with 30 % oxygen concentration is the closest to air combustion.

Keywords

boiler furnac; coal-O₂ /CO₂; numerical simulation; physial model; NO/SO₂

Hrčak ID:

218385

URI

https://hrcak.srce.hr/218385

Publication date:

1.7.2019.

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